Several researchers have also suggested that the pineal gland may prove to be more than just a hormonal production gland, that it may have a visual function. In the human pineal gland, the photoreceptors cells have evolved into “cone-like modified photoreceptor cells” known as pinealocytes. “Through stimulation of the pineal gland, neuromelanin is produced. Neuromelanin, a light-sensitive compound triggers the release of a substance which contains phosphorus, a light-producing chemical. By stimulating the pineal gland through vocal harmonics, it may be possible that actual fields of light around the body are enhanced.”